Yellow 3{40 -hydroxyquinophthalone-5-(p-phenylazo)carboxanilide dye

ABSTRACT

Yellow, water insoluble, preformed quinophthaloneazo dye, useful for dyeing cotton or synthetic fibers or blends or mixtures thereof by a process which requires no chemical modification of the dye, having the formula   WHEREIN A and B are the same or different and are selected from H, C1 4 alkyl, Cl and Br or A and B together are -C C-C C- and R&#39;&#39; is H or C1 4 alkyl.

United States Patent [1 1 Blackwell et al.

[ 1 YELLOW 3'-llYDROXYQUlNOPHTHALONE-5-(P- PHENYLAZO)CARBOXANILIDE DYE [75] Inventors: John Blackwell, Kenneth Sq., Pu.; Richard A. Fendglis, Wilmington, Del.

[73] Assignee: E. I. du Pont de Nemours and Company, Wilmington, Del.

[22] Filed: Apr. 16, 1973 [21] Appl. No.: 351,625

Related U.S. Application Data [62] Division of Ser. No. 94,524, Dec. 2, 1970, Pat. No.

[52] U.S. Cl. 260/155, 8/41 C, 8/50,

260/287 A, 260/289 QP, 260/326.l6 [51] Int. Cl. C07d 33/46, C09b 43/12 [58] Field of Search 260/155, 287 R [56] References Cited UNITED STATES PATENTS 3/1936 Kunz et a1 200/155 X 5/1939 Lange et al. 1 260/155 1/1956 Nawiasky et al..... 260/155 2/1962 Richter 260/286 Primary E.\'aminerFloyd D. Higel [57] ABSTRACT Yellow, water insoluble, preformed quinophthaloneazo dye, useful for dyeing cotton or synthetic fibers or blends or mixtures thereof by a process which requires no chemical modification of the dye, having the formula wherein A and B are the same or different and are selected from H, C,., alkyl, Cl and Br or A and B together are C=CC=C and IR is H or C alkyl.

1 Claim, No Drawings CROSS-REFERENCE TO RELATED APPLICATION This is a division of application Ser No. 94,524 filed Dec. 2, 1970 and issued Nov. 6, 1973 as US. Pat. No. 3,770,746.

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to water insoluble quinophthalone dyes which have utility in the dyeing of a broad spectrum of synthetic and natural materials, especially water swellable cellulosic materials, or mixtures or blends of such synthetic and natural materials.

2. Description of the Prior Art It is well known in the art that synthetic fibers, for example, fibers prepared from polyesters, polyamides or cellulose acetate, can be dyed with a wide variety of disperse dyes whose solubilities in water vary from very low to moderately high.

Natural fibers such as water swellable cellulosic fibers, especially cotton, are dyed by processes, and with dyes, which usually differ markedly from the processes and dyes employed with synthetic fibers. The conventional methods for dyeing water swellable cellulosic materials may be summarized as follows:

1. A high molecular weight water insoluble dye is formed within the material, either by reacting two smaller components, as in the formation of an azoic dye by a coupling reaction, or by a chemical reaction which renders insoluble dye precursor, as in vat and mordant dyeing.

2. A water soluble preformed dye having an affinity for the cellulosic material is exhausted onto the material from an aqueous solution by a procedure which involves reducing the solubility of the dye in the aqueous solution, as with direct dyes.

3. A dye containing a substituent which reacts with the cellulose or a modified cellulose is exhausted onto the material from either an aqueous or nonaqueous solution under conditions such that the dye is chemically bonded to the substrate, as with fiber reactive dyes.

4. Water insoluble pigments are bonded to the cellulose with polymeric materials, as in pigment printmg.

5. A finely divided form of a water insoluble dye is incorporated into the cellulose during a manufacturing step, as is sometimes done during spinning of viscose rayon.

None of these conventional procedures can be used to dye cellulose by directly introducing into the material a preformed, nonreactive, water insoluble dye since such dyes have little natural affinity for or substantivity to cellulosic materials.

Representative of the aforesaid processes wherein dyes are formed in situ after a precursor is deposited on or within the cellulose are processes disclosed in U.S. Pat. Nos. 396,692 and 2,069,215 and British Pat. No. 1,071,074. A process employing water soluble preformed dyes for dyeing cellulose is discussed in the Journal of the Society of Dyers and Colourists, 73, 23 (1957).

The aforesaid processes suffer from a variety of disadvantages, such as complexity of application, inability to achieve a broad spectrum of colors, and low fastness of the dyed cellulose to aqueous washing and/or drycleaning with organic solvents.

The use of dyes of lower water solubility for dyeing cotton is disclosed in British Pat. No. 1,112,279. The process involves the application of dye, water and urea or a structurally related compound to the substrate, followed by heating. In such a process dye utilization frequently is poor and undesirable basic degradation products from the urea or related compound may be formed.

Problems in addition to the above are encountered in the use of prior art dyes and dyeing processes for blends or mixtures of water swellable cellulosic and synthetic materials. Generally, complex two-stage processes are required and the components of the blend or mixture are dyed in separate steps with different dyes. Cross-staining may result and the amounts of dyes required usually are high, with each component undesirably interfering with the dyeing of the other. When cross-staining occurs, the dye must be capable of being scoured off the stained component. Even under optimum conditions, however, shade match on both components of the blend is difficult to achieve. The complexity of the two-stage process for dyeing blends also is apparent from a consideration of the divergency of operating conditions between conventional dyeing processes for water swellable cellulosic materials and synthetic materials. In contrast to the aforesaid procedures for dyeing water swellable cellulose, the usual procedures for dyeing synthetic materials are based on disso lution of water insoluble dyes in the synthetic material.

Representative of prior art on the dyeing of blends of such cellulosic and synthetic materials employing a two-stage process is US. Pat. No. 3,313,590. Analogous to the dyeing of such blends and confirming the aforesaid distinction between water swellable cellulosic materials and non-water swellable cellulose acetate, US. Pat. No. 3,153,563 discloses a two-stage process wherein the cellulose acetate is dyed with a water insoluble dye Without coloring the cellulose which then is dyed in an independent step.

The swelling of cotton fibers and other similar cellulosic materials by water has long been known. Swelling usually is rapid upon contact with. water, but it is facilitated by wetting agents and by heat. The swollen materials are enlarged, more flexible, reduced in strength, and otherwise modified in physical and mechanical properties. Because of their open structure, swollen cellulosic materials can be penetrated by and reacted with low molecular weight water soluble compounds. Valko and Limdi in the TextileResearch Journal, 32, 331-337 (1962) report that cotton can be swollen with water containing both highboiling, water soluble, nonreactive compounds of limited molecular weight and a crosslinking agent. The water can be removed with retention of swelling and crosslinking can then be effected. The authors suggest that the technique may be useful not only for the introduction into cotton of water soluble reactive materials (crosslinking agents) but also other reactive materials which are insoluble in water but soluble in said high boiling, water soluble, nonreactive compound. A similar technique is described in US. Pat. No. 2,339,913 issued Jan. 25, 1944 to Hanford and Holmes. The cellulosic is swollen with water, the water then is replaced with methanol-benzene and finally with benzene, with retention of swelling. A cellulosereactive material (crosslinking agent) is added as a benzene solution and crosslinking is effected.

Blackwell, Gumprecht and Starn in Canadian Pat.

No. 832,343 disclose a process for dyeing water swellable cellulosic materials with preformed disperse dyes, that is, dyes which do not require an in situ chemical reaction, such as oxidation or reduction, for development of color on the substrate, such as a fabric, which process comprises contacting the water swellable cellulosic material in any sequence with the following:

l. water in an amount sufficient to swell the cellulose; 2. a preformed dye in an amount sufficient to color the cellulose, a boiling saturated solution of which dye in 0.1 Molar aqueous sodium carbonate exhibits an optical absorbance not in excess of about 30; and 3. a solvent in an amount sufficient to maintain swelling of the cellulose if water is removed, and which a. is at least 2.5 weight percent soluble in water at 25C., b. boils above about 150C. at atmospheric pressure, 0. is a solvent for the dye at some temperature in the range of about to 225C, and d. has the formula n is 0 or 1;

m is a positive whole number; R is H, C alkyl, C aralkyl or alkaryl,

.* c-, R SO or 1300-, 1 II wherein R is C alkyl, C cycloalkyl, C aralkyl or alkaryl, C aryl, C aryl, or furfuryl;

R is -OH, OR SR NHR NR (C alkyl), --NR (C aralkyl or alkaryl),

@ 12 OSO2R2, -0(:'OR2 -Nll(pheny1) or NH(naphthyl), wherein R is as defined above;

x is the number of unsatisfied valencies in A; and

A is ROCH CHORCH CH CHORCH lution of dye in aqueous dye solvent or dye solvent is achieved by means of heat, by reducing the proportion of water to dye solvent, or by adding an auxiliary solvent. Embodiments of the process also include dyeing at elevated temperatures.

Still other embodiments of the aforesaid process in- OBJECTS AND SUMMARY OF THE INVENTION It is an object of the present invention to provide yellow water insoluble quinophthalone dyes which are useful in the above-described process of Blackwell et at. for dyeing water swellable cellulosic materials and blends or mixtures thereof with synthetic materials. It is a further object to provide dyes which give a good balance of shade when used to dye the aforesaid blends or mixtures. Another object is to provide water insoluble dyes which exhibit good fastness to light, washing, crocking and sublimation when applied to water swellable cellulosic materials, synthetic materials or blends or mixtures of such cellulosic and synthetic materials. Still another object is to provide water insoluble dyes which are useful for dyeing synthetic materials by conventional procedures.

In summary, the present invention resides in the discovery of dyes having the formula OH O u A CU COHNR N C) B wherein A and B are the same or different and are se-.

lected from H, C alkyl, Cl or Br or A and B together are =C-C=C, and R is o-, mor p-(C alkyl)- phenyl, o-, mor p-(C alkoxy)carbonylphenyl or wherein R is H or C alkyl. The preferred dye herein is the above wherein A and B and H and R is P- dodecylphenyl.

DETAILED DESCRIPTION OF THE INVENTION The aforesaid yellow quinophthalone dyes of this invention are prepared by condensing a quinophthalone acid halide of the formula with an amine R-NH In the above formulas A, B and R are as previously defined and X is Cl or Br. The condensation is carried out using conventional condensation quantities and conditions. For example, the reactants can be heated in a suitable organic solvent such as chlorobenzene or o-dichlorobenzene. If desired an acid acceptor can be present, for example, a tertiary amine or sodium carbonate.

Suitable amines of the formula RNH include those shown in Table 1.

TABLE I o-octylaniline p-octadecylaniline m-dodecylaniline anthranilic acid, butyl ester m-aminobenzoic acid, octyl ester p-aminobenzoic acid, dodecyl ester p-(phenylazo)aniline 4-(o-tolylazo)-2-toluidine 4-(o-n-butylphenylazo)-2-n-butylaniline The quinophthalone acid halide can be prepared by well known prior art techniques. The following description represents but one example of such known procedures. An isatin appropriately substituted with the aforesaid groups A and B is reacted with chloroacetone in the presence of calcium hydroxide to yield the substituted 3-hydroxy-2-methyl-4-quinolinecarboxylic acid. The acid is condensed with trimellitic acid or trimellitic anhydride by heating in an inert solvent such as o-dichlorobenzene to yield the substituted quinophthalone-S-carboxylic acid. This acid is reacted with thionyl chloride or bromide by heating in an inert solvent such as nitrobenzene to yield the desired quinophthalone acid halide of the above formula.

Suitable isatins which are useful herein include those shown in Table 2.

Table 2 isatin 6-chloro-7-rnethylisatin 7-ethylisatin 5-phenylisat n S-butylisatin -phenyhsatin 4,5-benzoisatin 5 ,7-dichloroisatin 5 .7-dibromoisatin 4,7-dimeth ylisatin 7-cthyl-5-methylisatin The cellulosic materials which can be dyed with the dyes of this invention by the previously described Blackwell et al. process include all forms of cellulose' of the forms in which they are conventionally used intextile materials and after any of the treatments conventionally used to prepare them for dyeing. Also included is cotton which has been treated in any way which does not significantly reduce its swelling upon heating with water; raw or scoured cotton and cotton which has been mercerized or otherwise preshrunk are dyeable with the dyes of this invention. Reconstituted cellulosic fibers which are sufficiently open in structure so that they are swollen by water and penetrated by a dye solvent are dyeable, for example, cuprammonium rayon. Xanthate viscose rayon normally has a structure which is more difficult to swell and may require exposure to dye, water, and dye solvent for somewhat longer times at lower temperatures. To facilitate dyeing, such fabrics can be pretreated with dilute aqueous caustic or the dyeing can be carried out in the presence of wetting agents, preferably of the nonionic type. Mixtures of cotton and rayon fibers can be dyed, and the present dyes also can be used to dye purifiied wood pulp and paper. Excluded herein as the water swellable cellulosic material is cellulose acetate which does not exhibit the requisite swellability in the presence of water.

The synthetic materials which can be dyed with the dyes of this invention include polyesters, polyamides, cellulose ethers and esters, and copolymers and mixtures thereof with other components intended to makethem more easily dyeable or to add other desirable properties. The dyes can be applied to synthetic materials by conventional procedures, such as the Thermosol or aqueous dyeing procedures. They also may be applied to such materials from solution in an organic solvent. Halocarbons such as perchloroethylene are particularly suitable solvents for this purpose since their low specific heats and latent heats of vaporization and low boiling points result in (a) a low power requirement to raise the dyebath temperature to and maintain it at the boil, and (b) ease of recovery of the solvent. Other advantages of the chlorinated solvents, such as nonflammability, low toxicity, and the like are readily apparent.

Surprisingly, the utility of the dyes of this invention in the solvent dyeing of polyester from perchloroethylene is not shared by the isomeric N-alkylanilino dyes.

The dyes of this invention can be applied to water swellable cellulosic materials, or to blends or mixtures thereof with synthetic materials by the above-described Blackwell et al. process. The dyes of this invention are particularly useful for dyeing mixtures and blends of cotton and polyester or polyamide, such as mixtures containing 50 to percent polyethylene terephthalate and 20 to 50 percent cotton. in such mixtures, the synthetic material is dyed using conventional process conditions. Since the dyes of this invention can be used to dye both components in a blend or mixture, scourability as a factor in dye selection is avoided since the previously described cross-staining problem has been minimized.

The dyes of this invention dye the substrate directly, that is, they do not require oxidation, reduction, hydrolysis, or any other chemical modification for development of color or fastness. The dyes exhibit excellent fastness to light, crocking, washing, sublimation and drycleaning.

In dyeing cellulosic materials with the dyes of this invention using the Blackwell et al. process, water, dye, and dye solvent can be applied to the substrate in any sequence as long as water and dye solvent are simultaneously present at some stage which is either before or simultaneous with actual dyeing. The preferred method for dyeing fabrics composed of cellulosic fibers or mixtures of cellulosic and synthetic fibers is to impregnate the fabric with a mixture of one or more dyes, water, and dye solvent in a conventional dye pad bath followed by squeezing to remove excess dye liquor, or to print with a solvent-containing printing paste, and subsequently heating to evaporate sufficient water to effect dissolution of the dye, at which time the fabric is dyed. Alternatively, water is evaporated, but in an insufficient amount to effect dissolution of the dye, after which pressure and heat are applied to effect dissolution without further evaporation of water. Dye pastes can be prepared by conventional techniques such as by milling the dye in the presence of .a dispersing agent or surfactant. A dyebath can be prepared by diluting the dye paste with water or with aqueous solvent. Addition of a solvent to the dye paste before addition of water may cause dye separation and usually is avoided. It will be understood by those skilled in the art that additives other than a dye solvent and a dispersing agent can be present in dye baths. Such additives frequently include migration inhibitors such as purified vegetable gums and wetting agents, examples of which are ionic and nonionic surfactants such as ethylene oxide condensation products, hydrocarbon sulfonates and long-chain alcohol sulfates. Dye baths used in practicing this invention also can contain dyes other than those of this invention; for example, direct dyes or fiber reactive dyes for cotton or for polyamides can be present for shading purposes.

In the preferred dyeing procedure with the dyes of this invention, an aqueous dye dispersion and the organic solvent are applied to the fabric from a single padbath. The amount of water in the padbath usually is 70-95 percent weight percent and the solvent, -30 weight percent. The padded fabric is heated at l80225C. for 30-180 seconds. For cotton, temperatures as low as 150C. usually are adequate. The dyed fabric generally is given an aqueous scour, or an aqueous scour followed by a perchloroethylene scour, to ensure complete removal of surface dye.

The following experiments show the utility of the dyes of this invention.

Dyeing 65/35 Dacron Polyester/Cotton Blend Fabric A. A padbath was prepared from:

an aqueous yellow dye paste active ingredient) A continuous length of 65/35 Dacron polyester/cotton fabric was padded at 60 percent uptake, based on the weight of the fiber, and the padded fabric was passed at a rate of 2 yards per minute between two 1,000 watt infrared lamps (Fostoria-Fannon, lnc., lnfraredtHeater Model 6624), with each lamp shining on opposite surfaces of the fabric from a distance of about 3 inches. The continuously moving fabric was passed through a circulating air oven at 80-100C., with a hold-up time of 1 minute, and then through an oven at 200-210C. with a hold-up time of 1.7 minutes. The hot, dry fabric was cooled to room temperature and rinsed for 1 minute each in sequence: in water at 30C., in water at 9095C., at 9095C. in water containing 1 percent of an ether-alcohol sulfate detergent, in water at 9095C., and in water at 2030C. The material was dried and then scoured for 5 minutes in perchloroethylene at 50C. Uniform deep yellow shades of good fastness were produced.

B. Experiment A was repeated except that the heating was carried out as follows. The padded fabric was passed at a rate of 2 yards per minute between banks of infrared lamps, with one 1,000 watt lamp (Fostoria- Fannon, Inc., Infrared Heater Model 6624) shining on each surface perpendicular to the fabric from a distance of about 3 inches. The moist fabric was then passed over a series of four revolving smooth-surfaced drums increasing stepwise in temperature from 100C. to about 150C. The average contact time on each drum was about 18 seconds. Next, the fabric moved continuously into an oven held at about 210C. where the total contact time was about seconds.

C. Experiment A was repeated except that the dye of Example 2 was employed. The polyester-cotton blend fabric was uniformly dyed a deep yellow shade of good fastness.

D. Experiment C was repeated except that the heating was carried out as in Experiment B.

Dyeing Cotton Broadcloth E. Experiment A was repeated except that a percent mercerized cotton broadcloth was employed, the amount of glycol was increased to grams, and the maximum temperature was reduced to about 180C. The cotton cloth was dyed a deep, uniform yellow shade of good fastness.

F. Experiment B was repeated, employing the modifications recited in Experiment E.

Printing of 100 Percent Cotton Fabric G. A cotton fabric was padded to about 70 percent pickup with an aqueous solution containing 200 grams per liter of polyethylene glycol (M.W. 600). The padded fabric was heated at C. for 5 minutes to evaporate water. The fabric was then printed in a pattern with a print paste prepared from:

an aqueous yellow paste (15% active ingredient) containing the dye of Example 3 10 grams purified natural gum ether thickener 60 grams water 30 grams.

The printed fabric was heated at C. for 100 seconds, scoured in water containing an ether-alcohol sulfate detergent at about 90C. for 5 minutes, dried, scoured in tetrachloroethylene at about 50C. for 5 minutes and dried. The printed areas were strongly dyed in a yellow shade.

Printing of 65/35 Dacron Polyester/Cotton Blend Fabric H. Experiment (G) was repeated except that a 65/35 Dacron" polyester/cotton fabric was employed and the maximum temperature was increased to 200C.

Dyeing of Dacron Polyester 15% active ingredient) containing the dye of Example 1 50 grams purified natural gum thickener 20 grams water to 1 liter The padded material was passed through an infrared predryer, then heated to and held at 415F. for 90 seconds. The fabric was rinsed in water at 80F., scoured for 5 minutes at 200F. in water containing 1 percent ether-alcohol sulfate detergent, rinsed in water at 80F. and dried. The polyester fabric was dyed a deep yellow shade.

Fabric samples from Experiments (A) and (C) were evaluated for fastness using standard tests describedin Textile Manual of American Association of Textile Chemists and Colorists, Vol. 45, 1969. The results are reported in Table 3. The first three columns show the shade change of the dyed fabric, the next two show the degree of stain on an undyed acetate or nylon fabric, and the last shows the sublimation into the undyed polyester/cotton fabric. The ratings are expressed with the following symbols:

Surprisingly, it has been found that certain colored dispersing agents, such as Marasperse B or Polyfon (both lignin sulfonates), can be employed to impart a brown stain to cotton or polyester-cotton blends by the procedures described above, which stains cannot be removed completely during the scouring procedure. These stains, however, have poor fastness to light. If the yellow dyes of this invention are dispersed in the presence of such dispersing agents and the aqueous dye pastes are then dyed or printed onto cotton or cotton blend fabrics, the shade of the dyed material appears to grow gradually brighter on exposure to light in a Xenon Arc Fade-Ometer as the stain from the dispersant is destroyed. In contrast, dye pastes that contain essentially colorless dispersing agents, such as "Blancol (a sulfonated naphthaleneformaldehyde condensate), give bright shades that show virtually no change after 40 hours in a Xenon Arc Fade-0meter. For example, Table 4 shows the results obtained when two samples of the dye of Example 5 were dispersed to aqueous pastes in (a) Polyfon O, and (b) Blancol, respectively, and dyed onto 65/35 polyester-cotton blend fabric by the method of Experiment (A) above.

Table 4 Light-Fastness (Xenon Arc Fade-Ometer) Dye hours) (40 hours) Example 5 Polyfon" O 3 Br 3 Br Example 5 Blancol" 5 5-4 Br culated. Marasperse B with an RCV of 100 is considered to be borderline; this figure is taken as the maximum acceptable value. Polyfon O with an RCV of 283.3 is well above the acceptable maximum. In con trast, Blancol with an RCV of 2.2 is well below the acceptable maximum.

Other common dispersing agents which are acceptable are listed in Table 5.

Table 5 Relative Color Value of Dispersing Agents Dispersing Agent Relative Color Value (RCV) Blanc'ol" 2.2l8 Dispersol" AC 0.426 L0mar" L 5.000 Lomar" PW 1.666 Tamol N 2.217 Tamol" 73l 0.069 "Tamol 850 0.082 Darvon" No. I 2.777 Daxad" KLS 5.521 Daxad" 30 0.071 Pctro 250 1.666 Nycol" NSR 3.055 Nycol NNC 2.654 Trenamine" W-25 0.044

Solvent Dyeing of Polyester Fibers .l. A S-gram swatch of fabric made from polyethylene terephthalate was heated to the boil for 1 hour in 400 grams of perchloroethylene containing 0.1 gram of the dye of Example 1. A deep yellow shade was produced on the polyester fabric.

The experiment was repeated using in place of the dye of Example 1 0.1 gram of the isomeric N- octylanilino dye (prepared by the procedure of Example 1 except that 41 parts of p-octylaniline were replaced by 41 parts of N-octylaniline). Only a slight stain was produced when an attempt was made to dye the polyester fabric.

Dyeing 65/35 Nylon/Cotton Blend Fabric K. A padbath was prepared from:

an aqueous yellow dye paste (l5% active ingredient) containing the dye of to 1 liter.

A continuous length of 65/35 nylon/cotton fabric was padded at 60 percent uptake, based on the weight of the fiber, and the padded fabric was passed at a rate of 2 yards per minute between two 1,000 watt infrared lamps (Fostoria-Fannon, lnc., Infrared Heater Model 6624), with each lamp shining on opposite surfaces of the fabric from a distance of about 3 inches. The continuously moving fabric was passed through a circulating air oven at l00C., with a hold-up time of 1 minute, and then through an oven at 180-l90C. with a hold-up time of 1.7 minutes. The hot, dry fabric was cooled to room temperature and rinsed for one minute each in sequence: In perchloroethylene at 50C., in water at 20-30C., in water at -95C., at 90 C. in water containing l percent of an ether-alcohol sulfate detergent, in water at 9()-95 C., and in water at 20-30C. The material was dried and subjected to a permanent-press procedure as follows. An aqueous padbath was made from:

Permafresh" 183 200 grams "Triton" X-l 2.5 grams Mykon SF 22.5 grams Rhoplex HA8 22.5 grams Silkand" 40 grams Catalyst X-4 36 grams Water to 1 liter.

The resin-impregnated material was air dried and cured at 325F. for 15 minutes.

Table 6 shows the results of fastness tests which were run on the uniformly dyed yellow material.

Table 6 Washfastness (AATCC Light-fastness 61-1968, no. lllA)- Sublimation (40 hours Xenon) Shade Change (4l0F.)

The following examples illustrate the preparation of dyes of this invention. All parts are given by weight EXAMPLE 1 Preparation of 3 -Hydroxyquinophthalone-S-carbox-p-octylanilide A mixture of 32.5 parts of 3 hydroxyquinophthalone-5-carboxylic acid and 350.

parts of monochlorobenzene was treated at room temperature with 2.1 parts of dimethylformamide and then with 21 parts of thionyl chloride. The reaction mixture was heated to 8085C. for Shows and theli allowed to cool to room temperature overnight. l5 Parts of so-- dium carbonate were then added and the mixture was stirred for minutes. 4] Parts of p-octylaniline were added and the 'reaction mixture was heated to 70-80C. for 3 hours, and then to l25C. for 3 hours. The reaction mixture was allowed to cool to room temperature overnight. The product was isolated by filtration, washed three times with monochlorobenzene. then with isopropanol, and finally with water. The cake was reslurried in lN-sodium carbonate solution, isolated by filtration, washed with water until alkali-free, and dried. l8 Parts of dye were obtained; the product melted partially at l942 14C., but mostly at 260-265C., and had an absorptivity of 58.0 liters gram cm. at 443 m,u..

Thin layer chromatography on silica gel-coated glass plates, using benzenezethyl acetate=3:2 as eluent, indicated no starting material in the yellow dye.

Found: C, 73.7; 73.4; H, 6.2, 6.4; N, 5.4, 5.4. Calcd. for C H N O C, 76.15; H, 6.15; N,5.38. Based on the above, the structure of the dye is EXAMPLE 2 Preparation of 3 -Hydroxyquinophthalone-S-carbox-p-Dodecylanilide A mixture of 275 parts of chlorobenzene and 25 parts of 3'-hydroxyquinophthalone-S-carboxylic acid was heated with stirring to C. and treated with 1.1 parts of dimethylformamide and then with 16 parts of thionyl chloride (added dropwise). The reaction mixture was stirred at 8l85C. for 8 hours, after which the excess thionyl chloride was removed by sweeping the system with nitrogen. The reaction mixture was cooled to 40C. and 76 parts of p-dodecylaniline were added.

The mixture was heated to the reflux temperature. The

product was isolated by filtration, washed thoroughly with ethanol, then with hot water, and dried. 21 Parts of product were obtained; the product melted at l84-l85C. and had an absorptivity of 87.4 liters gram cm. at 440 mu. Thin layer chromatography indicated one colored component only. Based on the above, the yellow dye has the structure CONH@C12H25 EXAMPLE 3 Preparation of 3-Hydroxyquinophthalone-S-carbox-poctadecylanilide '-Hydroxyquinophthalone-5-carbox-p-octadecylanilide When 76 parts of p-dodecylaniline were replaced by I32 parts of p-octadecylaniline in the procedure of Example 2, a chromatographically pure dye was obtained having the same shade and fastness properties on cotored impurities; it exhibited an absorption maximum at ton-polyester blend fabric as the dye of Example 2. 440 mu. Based on the above, the: dye has the structure Based on the above, the yellow dye has the structure 65/35 Polyester-cotton blend fabric was union-dyed in [@th @aaa EXAMPLE 4 yellow shades with this dye; the fastness properties preparation f were equivalent to those of the dye of Example I. 6'-benz0quinophthalone-S-carbox-p-d0decylanilide EXAMPLE 6 When 25 parts of 3-hydroxyquinophthalo Reaction of 3'-Hydroxyquinophthalone-S-carbonyl carboxyllc acid were replaced in the procedure of Exid i h -(phenylazo)aniline ample 2 by 29 parts of 3 -hydroxy-5 -,6 3O benzoquinophthalone-5-carboxylic acid, a yellow dye when 36 Parts of y ne n the was obtained which was shown by thin layer chromaprocedul'e of Exillllple 5 were replaced P) 3 l P (ll tography to contain no colored impurities. Based on P-(p nyl z0) m m El y as Obtained of Similar the above, the dye has the structure U shade and equivalent fastness properties on 65/35 Q5 OH LO Q CONH n-C H It was redder in shade than the dye of Example 2. Cot- Polyester-cotton blend Based the above, the

ton and polyester fibers were dyed in yellow shades of dye has the structure good fastness with this dye by the methods described in OH H i V V i Experiments A to l. O

so oer N EXAMPLE 5 C CONH N Reaction of 3'-Hydroxyquinophthalone-S-carbonyl O Chloride with 4-(o-tolylazol-Ltoluidine A stirred mixture of 52.5 parts of 3'- OH hydroxyquinophthalone-S-carbonyl chloride, 36 parts of 4-(o-tolylazo)-2-toluidine, 15 parts of sodium car- N O bonate and 1,100 parts of chlorobenzene was heated to 92-98C. for 30 minutes. The mixture was then heated to the reflux temperature for 4 /2 hours and then al- EXAMPLE 7 lowed to cool to room temperature with stirring overnight. The product was isolated by filtration and washed in sequence with benzene, ethanol, hot 1N- sodium carbonate solution and boiling water. The last A mixture of 65.4 parts of 3'- two washes were continued until the washings were 'hydroxyquinophthalone5-carbonyl chloride, 67 parts clear. Weight of dried dye was l5 parts. The dye was of octyl anthranilate, 24.2 parts of N,N-diethylaniline shown by thin layer chromatography to be free of coland 950 parts of monochlorobenzerne was heated to the Reaction of 3'-Hydroxyquinophthalone-S-carbonyl chloride with octyl anthranilate Yellow shades of excellent fastness properties were produced on 65/35 polyester-cotton blend fabric by the procedures described above.

The embodiments of the invention in which an exclusive property on privilege is claimed are defined as follows:

1. Yellow water insoluble quinophthaloneazo dye having the formula was 77 parts. Based on the above, the dye has the structure I Q on" ll O {)2 wherein A and B are the same or different and are selected from H, C alkyl (but not adjacent t-butyl), Cl and Br or A and B are adjacent and together are C=CC=C- and R is H or C alkyl.

UNITED STATES PATENT OFFICE fiTIFICATE 9F CORRECTION PATENT NO. 3,865,804

D TED 1 February 11, i975 INVENTOR(S) John Blackwell & Richard A. Fenoglio it is certified that error appears in the ab0ve-identified patent and that said Letters Patent are hereby corrected as shown below:

Abstract page, column 1, Item 75 "Inventors: John Blackwell, Kenneth Sq. Pa.

Richard A, Fendglis, Wilmington, Del."

should read Inventors: John Blackwell, Kennett Sq. Pa.

Richard A. Fenoglio, Wilmington, DelQ- Signed and sealed this 17th day of June 1975.

(SEAL) Attest:

C. MARSHALL DAN-N RUTH (I, MASON Commissioner of Patents Attesting Officer and Trademarks 

1. YELLOW WATER INSOLUBLE QUINOPHTHALONEAZO DYE HAVING THE FORMULA 